3 // GLUTmain.cxx -- top level sim routines
5 // Written by Curtis Olson for OpenGL, started May 1997.
7 // Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
9 // This program is free software; you can redistribute it and/or
10 // modify it under the terms of the GNU General Public License as
11 // published by the Free Software Foundation; either version 2 of the
12 // License, or (at your option) any later version.
14 // This program is distributed in the hope that it will be useful, but
15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 // General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 // (Log is kept at end of this file)
45 #include <sys/stat.h> /* for stat() */
48 # include <unistd.h> /* for stat() */
51 #include <Include/fg_constants.h> // for VERSION
52 #include <Include/general.h>
54 #include <Aircraft/aircraft.h>
55 #include <Astro/moon.hxx>
56 #include <Astro/planets.hxx>
57 #include <Astro/sky.hxx>
58 #include <Astro/stars.hxx>
59 #include <Astro/sun.hxx>
61 #ifdef HAVE_AUDIO_SUPPORT
62 # include <Audio/src/sl.h>
63 # include <Audio/src/sm.h>
66 #include <Cockpit/cockpit.hxx>
67 #include <Debug/fg_debug.h>
69 #include <Joystick/joystick.h>
70 #include <Math/fg_geodesy.h>
71 #include <Math/mat3.h>
72 #include <Math/polar3d.hxx>
74 #include <Scenery/scenery.hxx>
75 #include <Scenery/tilemgr.hxx>
76 #include <Time/event.hxx>
77 #include <Time/fg_time.hxx>
78 #include <Time/fg_timer.hxx>
79 #include <Time/sunpos.hxx>
80 #include <Weather/weather.h>
82 #include "GLUTkey.hxx"
83 #include "fg_init.hxx"
84 #include "options.hxx"
89 // This is a record containing global housekeeping information
92 // Specify our current idle function state. This is used to run all
93 // our initializations out of the glutIdleLoop() so that we can get a
94 // splash screen up and running right away.
95 static idle_state = 0;
100 // Global structures for the Audio library
101 #ifdef HAVE_AUDIO_SUPPORT
102 slScheduler *audio_sched;
103 smMixer *audio_mixer;
109 // The following defines flight gear options. Because glutlib will also
110 // want to parse its own options, those options must not be included here
111 // or they will get parsed by the main program option parser. Hence case
112 // is significant for any option added that might be in conflict with
115 // glutlib parses for:
117 // -direct (invalid in Win32)
121 // -indirect (invalid in Win32)
124 // Note that glutlib depends upon strings while this program's
125 // option parser wants only initial characters followed by numbers
130 // fgInitVisuals() -- Initialize various GL/view parameters
131 static void fgInitVisuals( void ) {
136 l = &cur_light_params;
137 o = ¤t_options;
138 w = ¤t_weather;
140 // Go full screen if requested ...
141 if ( o->fullscreen ) {
145 // If enabled, normal vectors specified with glNormal are scaled
146 // to unit length after transformation. See glNormal.
147 xglEnable( GL_NORMALIZE );
149 xglEnable( GL_LIGHTING );
150 xglEnable( GL_LIGHT0 );
151 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
153 // xglFogi (GL_FOG_MODE, GL_LINEAR);
154 xglFogi (GL_FOG_MODE, GL_EXP2);
155 // Fog density is now set when the weather system is initialized
156 // xglFogf (GL_FOG_DENSITY, w->fog_density);
157 if ( (o->fog == 1) || (o->shading == 0) ) {
158 // if fastest fog requested, or if flat shading force fastest
159 xglHint (GL_FOG_HINT, GL_FASTEST );
160 } else if ( o->fog == 2 ) {
161 xglHint (GL_FOG_HINT, GL_NICEST );
163 if ( o->wireframe ) {
165 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
168 // This is the default anyways, but it can't hurt
169 xglFrontFace ( GL_CCW );
173 // Update the view volume, position, and orientation
174 static void fgUpdateViewParams( void ) {
180 f = current_aircraft.flight;
181 l = &cur_light_params;
182 o = ¤t_options;
186 v->UpdateWorldToEye(f);
188 // if (!o->panel_status) {
189 // xglViewport( 0, (GLint)((v->winHeight) / 2 ) ,
190 // (GLint)(v->winWidth), (GLint)(v->winHeight) / 2 );
191 // Tell GL we are about to modify the projection parameters
192 // xglMatrixMode(GL_PROJECTION);
193 // xglLoadIdentity();
194 // gluPerspective(o->fov, v->win_ratio / 2.0, 1.0, 100000.0);
196 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) );
197 // Tell GL we are about to modify the projection parameters
198 xglMatrixMode(GL_PROJECTION);
200 if ( FG_Altitude * FEET_TO_METER - scenery.cur_elev > 10.0 ) {
201 gluPerspective(o->fov, v->win_ratio, 10.0, 100000.0);
203 gluPerspective(o->fov, v->win_ratio, 1.0, 100000.0);
204 // printf("Near ground, minimizing near clip plane\n");
208 xglMatrixMode(GL_MODELVIEW);
211 // set up our view volume (default)
212 fg_gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
213 v->view_pos.x + v->view_forward[0],
214 v->view_pos.y + v->view_forward[1],
215 v->view_pos.z + v->view_forward[2],
216 v->view_up[0], v->view_up[1], v->view_up[2]);
218 // look almost straight up (testing and eclipse watching)
219 /* fg_gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
220 v->view_pos.x + v->view_up[0] + .001,
221 v->view_pos.y + v->view_up[1] + .001,
222 v->view_pos.z + v->view_up[2] + .001,
223 v->view_up[0], v->view_up[1], v->view_up[2]); */
225 // lock view horizontally towards sun (testing)
226 /* fg_gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
227 v->view_pos.x + v->surface_to_sun[0],
228 v->view_pos.y + v->surface_to_sun[1],
229 v->view_pos.z + v->surface_to_sun[2],
230 v->view_up[0], v->view_up[1], v->view_up[2]); */
232 // lock view horizontally towards south (testing)
233 /* fg_gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
234 v->view_pos.x + v->surface_south[0],
235 v->view_pos.y + v->surface_south[1],
236 v->view_pos.z + v->surface_south[2],
237 v->view_up[0], v->view_up[1], v->view_up[2]); */
239 // set the sun position
240 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
245 // Draw a basic instrument panel
246 static void fgUpdateInstrViewParams( void ) {
254 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
256 xglMatrixMode(GL_PROJECTION);
260 gluOrtho2D(0, 640, 0, 480);
261 xglMatrixMode(GL_MODELVIEW);
265 xglColor3f(1.0, 1.0, 1.0);
268 xglDisable(GL_DEPTH_TEST);
269 xglDisable(GL_LIGHTING);
272 xglColor3f (0.5, 0.5, 0.5);
275 xglVertex2f(0.0, 0.00);
276 xglVertex2f(0.0, 480.0);
277 xglVertex2f(640.0,480.0);
278 xglVertex2f(640.0, 0.0);
281 xglRectf(0.0,0.0, 640, 480);
282 xglEnable(GL_DEPTH_TEST);
283 xglEnable(GL_LIGHTING);
284 xglMatrixMode(GL_PROJECTION);
286 xglMatrixMode(GL_MODELVIEW);
292 // Update all Visuals (redraws anything graphics related)
293 static void fgRenderFrame( void ) {
300 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
301 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
302 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
303 GLbitfield clear_mask;
305 f = current_aircraft.flight;
306 l = &cur_light_params;
307 o = ¤t_options;
308 t = &cur_time_params;
311 if ( idle_state != 1000 ) {
312 // still initializing, draw the splash screen
313 if ( o->splash_screen == 1 ) {
317 // idle_state is now 1000 meaning we've finished all our
318 // initializations and are running the main loop, so this will
319 // now work without seg faulting the system.
321 // printf("Ground = %.2f Altitude = %.2f\n", scenery.cur_elev,
322 // FG_Altitude * FEET_TO_METER);
324 // this is just a temporary hack, to make me understand Pui
325 timerText -> setLabel (ctime (&t->cur_time));
328 // update view volume parameters
329 fgUpdateViewParams();
331 clear_mask = GL_DEPTH_BUFFER_BIT;
332 if ( o->wireframe ) {
333 clear_mask |= GL_COLOR_BUFFER_BIT;
336 glClearColor(black[0], black[1], black[2], black[3]);
338 glClearColor(l->sky_color[0], l->sky_color[1],
339 l->sky_color[2], l->sky_color[3]);
340 clear_mask |= GL_COLOR_BUFFER_BIT;
342 xglClear( clear_mask );
344 // Tell GL we are switching to model view parameters
345 xglMatrixMode(GL_MODELVIEW);
346 // xglLoadIdentity();
349 xglDisable( GL_DEPTH_TEST );
350 xglDisable( GL_LIGHTING );
351 xglDisable( GL_CULL_FACE );
352 xglDisable( GL_FOG );
353 xglShadeModel( GL_SMOOTH );
358 // setup transformation for drawing astronomical objects
360 // Translate to view position
361 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
362 // Rotate based on gst (sidereal time)
363 // note: constant should be 15.041085, Curt thought it was 15
364 angle = t->gst * 15.041085;
365 // printf("Rotating astro objects by %.2f degrees\n",angle);
366 xglRotatef( angle, 0.0, 0.0, -1.0 );
368 // draw stars and planets
376 xglEnable( GL_LIGHTING );
377 // set lighting parameters
378 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
379 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
380 xglEnable( GL_CULL_FACE );
382 // Let's try some blending technique's (Durk)
384 glBlendFunc(GL_ONE, GL_ONE);
392 xglShadeModel( GL_SMOOTH );
394 xglShadeModel( GL_FLAT );
396 xglEnable( GL_DEPTH_TEST );
399 xglFogfv (GL_FOG_COLOR, l->fog_color);
401 // set lighting parameters
402 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
403 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
406 // texture parameters
407 xglEnable( GL_TEXTURE_2D );
408 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
409 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
410 // set base color (I don't think this is doing anything here)
411 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
412 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
414 xglDisable( GL_TEXTURE_2D );
415 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
416 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
417 // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
418 // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
423 xglDisable( GL_TEXTURE_2D );
425 // display HUD && Panel
428 // display instruments
429 // if (!o->panel_status) {
430 // fgUpdateInstrViewParams();
439 // Update internal time dependent calculations (i.e. flight model)
440 void fgUpdateTimeDepCalcs(int multi_loop) {
446 f = current_aircraft.flight;
447 t = &cur_time_params;
450 // update the flight model
451 if ( multi_loop < 0 ) {
452 multi_loop = DEFAULT_MULTILOOP;
455 // printf("updating flight model x %d\n", multi_loop);
456 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
458 // update the view angle
459 for ( i = 0; i < multi_loop; i++ ) {
460 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
461 v->view_offset = v->goal_view_offset;
464 // move v->view_offset towards v->goal_view_offset
465 if ( v->goal_view_offset > v->view_offset ) {
466 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
467 v->view_offset += 0.01;
469 v->view_offset -= 0.01;
472 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
473 v->view_offset -= 0.01;
475 v->view_offset += 0.01;
478 if ( v->view_offset > FG_2PI ) {
479 v->view_offset -= FG_2PI;
480 } else if ( v->view_offset < 0 ) {
481 v->view_offset += FG_2PI;
488 void fgInitTimeDepCalcs( void ) {
491 #ifdef HAVE_SETITIMER
492 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
493 #endif HAVE_SETITIMER
498 // What should we do when we have nothing else to do? Let's get ready
499 // for the next move and update the display?
500 static void fgMainLoop( void ) {
504 static int remainder = 0;
505 int elapsed, multi_loop;
508 // double joy_x, joy_y;
509 // int joy_b1, joy_b2;
511 f = current_aircraft.flight;
513 t = &cur_time_params;
515 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
516 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
518 // Fix elevation. I'm just sticking this here for now, it should
519 // probably move eventually
521 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
523 FG_Runway_altitude * FEET_TO_METER,
524 FG_Altitude * FEET_TO_METER); */
526 if ( scenery.cur_elev > -9990 ) {
527 if ( FG_Altitude * FEET_TO_METER <
528 (scenery.cur_elev + 3.758099 * FEET_TO_METER - 3.0) ) {
529 // now set aircraft altitude above ground
530 printf("Current Altitude = %.2f < %.2f forcing to %.2f\n",
531 FG_Altitude * FEET_TO_METER,
532 scenery.cur_elev + 3.758099 * FEET_TO_METER - 3.0,
533 scenery.cur_elev + 3.758099 * FEET_TO_METER);
534 fgFlightModelSetAltitude( FG_LARCSIM, f,
536 3.758099 * FEET_TO_METER);
538 fgPrintf( FG_ALL, FG_BULK,
539 "<*> resetting altitude to %.0f meters\n",
540 FG_Altitude * FEET_TO_METER);
542 FG_Runway_altitude = scenery.cur_elev * METER_TO_FEET;
545 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
547 FG_Runway_altitude * FEET_TO_METER,
548 FG_Altitude * FEET_TO_METER); */
554 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
555 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
556 joy_x, joy_y, joy_b1, joy_b2 );
558 fgAileronSet( joy_x ); */
560 // Get elapsed time for this past frame
561 elapsed = fgGetTimeInterval();
562 fgPrintf( FG_ALL, FG_BULK,
563 "Time interval is = %d, previous remainder is = %d\n",
566 // Calculate frame rate average
567 if ( elapsed > 0.0 ) {
569 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
570 accum += g->frames[i];
571 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
572 g->frames[i+1] = g->frames[i];
574 g->frames[0] = 1000.0 / (float)elapsed;
575 // printf("frame[0] = %.2f\n", g->frames[0]);
576 accum += g->frames[0];
577 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
578 // printf("ave = %.2f\n", g->frame_rate);
581 // Calculate model iterations needed for next frame
582 fgPrintf( FG_ALL, FG_DEBUG,
583 "--> Frame rate is = %.2f\n", g->frame_rate);
584 elapsed += remainder;
586 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
587 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
588 fgPrintf( FG_ALL, FG_BULK,
589 "Model iterations needed = %d, new remainder = %d\n",
590 multi_loop, remainder);
592 /* printf("right before fm - ground = %.2f runway = %.2f alt = %.2f\n",
594 FG_Runway_altitude * FEET_TO_METER,
595 FG_Altitude * FEET_TO_METER); */
598 if ( ! use_signals ) {
600 fgUpdateTimeDepCalcs(multi_loop);
603 /* printf("After fm - ground = %.2f runway = %.2f alt = %.2f\n",
605 FG_Runway_altitude * FEET_TO_METER,
606 FG_Altitude * FEET_TO_METER); */
608 // fgAircraftOutputCurrent(a);
610 // see if we need to load any new scenery tiles
613 // Process/manage pending events
614 global_events.Process();
616 // Run audio scheduler
617 #ifdef HAVE_AUDIO_SUPPORT
618 audio_sched -> update();
624 fgPrintf( FG_ALL, FG_DEBUG, "\n");
628 // This is the top level master main function that is registered as
632 // The first few passes take care of initialization things (a couple
633 // per pass) and once everything has been initialized fgMainLoop from
636 static void fgIdleFunction ( void ) {
639 char path[256], mp3file[256], command[256], slfile[256];
640 static char *lockfile = "/tmp/mpg123.running";
643 o = ¤t_options;
645 // printf("idle state == %d\n", idle_state);
647 if ( idle_state == 0 ) {
648 // Initialize the splash screen right away
649 if ( o->splash_screen ) {
654 } else if ( idle_state == 1 ) {
655 // Start the intro music
657 if ( o->intro_music ) {
658 strcpy(mp3file, o->fg_root);
659 strcat(mp3file, "/Sounds/");
660 strcat(mp3file, "intro.mp3");
662 "(touch %s; mpg123 %s > /dev/null 2>&1; /bin/rm %s) &",
663 lockfile, mp3file, lockfile );
664 fgPrintf( FG_GENERAL, FG_INFO,
665 "Starting intro music: %s\n", mp3file);
671 } else if ( idle_state == 2 ) {
672 // These are a few miscellaneous things that aren't really
673 // "subsystems" but still need to be initialized.
674 if( !fgInitGeneral()) {
675 fgPrintf( FG_GENERAL, FG_EXIT,
676 "General initializations failed ...\n" );
679 if ( strstr ( g->glRenderer, "Glide" ) ) {
680 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
685 } else if ( idle_state == 3 ) {
686 // This is the top level init routine which calls all the
687 // other subsystem initialization routines. If you are adding
688 // a subsystem to flight gear, its initialization call should
689 // located in this routine.
690 if( !fgInitSubsystems()) {
691 fgPrintf( FG_GENERAL, FG_EXIT,
692 "Subsystem initializations failed ...\n" );
696 } else if ( idle_state == 4 ) {
697 // setup OpenGL view parameters
701 // init timer routines, signals, etc. Arrange for an alarm
702 // signal to be generated, etc.
703 fgInitTimeDepCalcs();
707 } else if ( idle_state == 5 ) {
708 //Init the user interface
712 } else if ( idle_state == 6 ) {
713 // Initialize audio support
714 #ifdef HAVE_AUDIO_SUPPORT
717 if ( o->intro_music ) {
718 // Let's wait for mpg123 to finish
719 struct stat stat_buf;
721 fgPrintf( FG_GENERAL, FG_INFO,
722 "Waiting for mpg123 player to finish " );
723 while ( stat(lockfile, &stat_buf) == 0 ) {
724 // file exist, wait ...
726 fgPrintf( FG_GENERAL, FG_INFO, ".");
728 fgPrintf( FG_GENERAL, FG_INFO, "\n");
732 audio_sched = new slScheduler ( 8000 );
733 audio_mixer = new smMixer;
734 audio_mixer -> setMasterVolume ( 30 ) ; /* 50% of max volume. */
735 audio_sched -> setSafetyMargin ( 1.0 ) ;
736 strcpy(path, o->fg_root);
737 strcat(path, "/Sounds/");
739 strcpy(slfile, path);
740 strcat(slfile, "prpidle.wav");
741 // s1 = new slSample ( slfile );
742 s1 = new slSample ( "/dos/X-System-HSR/sounds/xp_recip.wav",
744 printf("Rate = %d Bps = %d Stereo = %d\n",
745 s1 -> getRate(), s1 -> getBps(), s1 -> getStereo());
746 audio_sched -> loopSample ( s1 );
748 // strcpy(slfile, path);
749 // strcat(slfile, "thunder.wav");
750 // s2 -> loadFile ( slfile );
751 // s2 -> adjustVolume(0.5);
752 // audio_sched -> playSample ( s2 );
759 if ( idle_state == 1000 ) {
760 // We've finished all our initialization steps, from now on we
761 // run the main loop.
765 if ( o->splash_screen == 1 ) {
772 // Handle new window size or exposure
773 static void fgReshape( int width, int height ) {
778 // Do this so we can call fgReshape(0,0) ourselves without having
779 // to know what the values of width & height are.
780 if ( (height > 0) && (width > 0) ) {
781 v->win_ratio = (GLfloat) width / (GLfloat) height;
785 v->winHeight = height;
787 // Inform gl of our view window size (now handled elsewhere)
788 // xglViewport(0, 0, (GLint)width, (GLint)height);
789 if ( idle_state == 1000 ) {
790 // yes we've finished all our initializations and are running
791 // the main loop, so this will now work without seg faulting
793 fgUpdateViewParams();
796 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
800 // Initialize GLUT and define a main window
801 int fgGlutInit( int *argc, char **argv ) {
802 // GLUT will extract all glut specific options so later on we only
803 // need wory about our own.
804 xglutInit(argc, argv);
806 // Define Display Parameters
807 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
809 // Define initial window size
810 xglutInitWindowSize(640, 480);
812 // Initialize windows
813 xglutCreateWindow("Flight Gear");
819 // Initialize GLUT event handlers
820 int fgGlutInitEvents( void ) {
821 // call fgReshape() on window resizes
822 xglutReshapeFunc( fgReshape );
824 // call GLUTkey() on keyboard event
825 xglutKeyboardFunc( GLUTkey );
826 glutSpecialFunc( GLUTspecialkey );
828 // call guiMouseFunc() whenever our little rodent is used
829 glutMouseFunc ( guiMouseFunc );
830 glutMotionFunc (guiMotionFunc );
831 glutPassiveMotionFunc (guiMotionFunc );
833 // call fgMainLoop() whenever there is
834 // nothing else to do
835 xglutIdleFunc( fgIdleFunction );
838 xglutDisplayFunc( fgRenderFrame );
845 int main( int argc, char **argv ) {
849 int result; // Used in command line argument.
851 f = current_aircraft.flight;
852 o = ¤t_options;
855 _control87(MCW_EM, MCW_EM); /* defined in float.h */
858 // Initialize the debugging output system
861 fgPrintf(FG_GENERAL, FG_INFO, "Flight Gear: Version %s\n\n", VERSION);
863 // Initialize the Window/Graphics environment.
864 if( !fgGlutInit(&argc, argv) ) {
865 fgPrintf( FG_GENERAL, FG_EXIT, "GLUT initialization failed ...\n" );
868 // Initialize the various GLUT Event Handlers.
869 if( !fgGlutInitEvents() ) {
870 fgPrintf( FG_GENERAL, FG_EXIT,
871 "GLUT event handler initialization failed ...\n" );
874 // Attempt to locate and parse a config file
875 // First check fg_root
876 strcpy(config, o->fg_root);
877 strcat(config, "/system.fgfsrc");
878 result = o->parse_config_file(config);
880 // Next check home directory
881 if ( getenv("HOME") != NULL ) {
882 strcpy(config, getenv("HOME"));
883 strcat(config, "/.fgfsrc");
884 result = o->parse_config_file(config);
887 // Parse remaining command line options
888 // These will override anything specified in a config file
889 result = o->parse_command_line(argc, argv);
890 if ( result != FG_OPTIONS_OK ) {
891 // Something must have gone horribly wrong with the command
892 // line parsing or maybe the user just requested help ... :-)
894 fgPrintf( FG_GENERAL, FG_EXIT, "\nExiting ...\n");
897 // pass control off to the master GLUT event handler
900 // we never actually get here ... but just in case ... :-)
906 // Revision 1.34 1998/07/13 15:32:37 curt
907 // Clear color buffer if drawing wireframe.
908 // When specifying and airport, start elevation at -1000 and let the system
909 // position you at ground level.
911 // Revision 1.33 1998/07/12 03:14:42 curt
912 // Added ground collision detection.
913 // Did some serious horsing around to be able to "hug" the ground properly
914 // and still be able to take off.
915 // Set the near clip plane to 1.0 meters when less than 10 meters above the
917 // Did some serious horsing around getting the initial airplane position to be
918 // correct based on rendered terrain elevation.
919 // Added a little cheat/hack that will prevent the view position from ever
920 // dropping below the terrain, even when the flight model doesn't quite
921 // put you as high as you'd like.
923 // Revision 1.32 1998/07/08 14:45:07 curt
924 // polar3d.h renamed to polar3d.hxx
925 // vector.h renamed to vector.hxx
926 // updated audio support so it waits to create audio classes (and tie up
927 // /dev/dsp) until the mpg123 player is finished.
929 // Revision 1.31 1998/07/06 21:34:17 curt
930 // Added an enable/disable splash screen option.
931 // Added an enable/disable intro music option.
932 // Added an enable/disable instrument panel option.
933 // Added an enable/disable mouse pointer option.
934 // Added using namespace std for compilers that support this.
936 // Revision 1.30 1998/07/06 02:42:03 curt
937 // Added support for switching between fullscreen and window mode for
940 // Added a basic splash screen. Restructured the main loop and top level
941 // initialization routines to do this.
943 // Hacked in some support for playing a startup mp3 sound file while rest
944 // of sim initializes. Currently only works in Unix using the mpg123 player.
945 // Waits for the mpg123 player to finish before initializing internal
948 // Revision 1.29 1998/07/04 00:52:22 curt
949 // Add my own version of gluLookAt() (which is nearly identical to the
950 // Mesa/glu version.) But, by calculating the Model View matrix our selves
951 // we can save this matrix without having to read it back in from the video
952 // card. This hopefully allows us to save a few cpu cycles when rendering
953 // out the fragments because we can just use glLoadMatrixd() with the
954 // precalculated matrix for each tile rather than doing a push(), translate(),
955 // pop() for every fragment.
957 // Panel status defaults to off for now until it gets a bit more developed.
959 // Extract OpenGL driver info on initialization.
961 // Revision 1.28 1998/06/27 16:54:32 curt
962 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
963 // Don't change the view port when displaying the panel.
965 // Revision 1.27 1998/06/17 21:35:10 curt
966 // Refined conditional audio support compilation.
967 // Moved texture parameter setup calls to ../Scenery/materials.cxx
968 // #include <string.h> before various STL includes.
969 // Make HUD default state be enabled.
971 // Revision 1.26 1998/06/13 00:40:32 curt
972 // Tweaked fog command line options.
974 // Revision 1.25 1998/06/12 14:27:26 curt
975 // Pui -> PUI, Gui -> GUI.
977 // Revision 1.24 1998/06/12 00:57:39 curt
978 // Added support for Pui/Gui.
979 // Converted fog to GL_FOG_EXP2.
980 // Link to static simulator parts.
981 // Update runfg.bat to try to be a little smarter.
983 // Revision 1.23 1998/06/08 17:57:04 curt
984 // Minor sound/startup position tweaks.
986 // Revision 1.22 1998/06/05 18:18:40 curt
987 // A bit of fiddling with audio ...
989 // Revision 1.21 1998/06/03 22:01:06 curt
990 // Tweaking sound library usage.
992 // Revision 1.20 1998/06/03 00:47:11 curt
993 // Updated to compile in audio support if OSS available.
994 // Updated for new version of Steve's audio library.
995 // STL includes don't use .h
996 // Small view optimizations.
998 // Revision 1.19 1998/06/01 17:54:40 curt
999 // Added Linux audio support.
1000 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
1003 // Revision 1.18 1998/05/29 20:37:19 curt
1004 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
1005 // Read airport list into a "map" STL for dynamic list sizing and fast tree
1008 // Revision 1.17 1998/05/22 21:28:52 curt
1009 // Modifications to use the new fgEVENT_MGR class.
1011 // Revision 1.16 1998/05/20 20:51:33 curt
1012 // Tweaked smooth shaded texture lighting properties.
1013 // Converted fgLIGHT to a C++ class.
1015 // Revision 1.15 1998/05/16 13:08:34 curt
1016 // C++ - ified views.[ch]xx
1017 // Shuffled some additional view parameters into the fgVIEW class.
1018 // Changed tile-radius to tile-diameter because it is a much better
1020 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
1021 // to transform world space to eye space for view frustum culling.
1023 // Revision 1.14 1998/05/13 18:29:57 curt
1024 // Added a keyboard binding to dynamically adjust field of view.
1025 // Added a command line option to specify fov.
1026 // Adjusted terrain color.
1027 // Root path info moved to fgOPTIONS.
1028 // Added ability to parse options out of a config file.
1030 // Revision 1.13 1998/05/11 18:18:15 curt
1031 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
1033 // Revision 1.12 1998/05/07 23:14:15 curt
1034 // Added "D" key binding to set autopilot heading.
1035 // Made frame rate calculation average out over last 10 frames.
1036 // Borland C++ floating point exception workaround.
1037 // Added a --tile-radius=n option.
1039 // Revision 1.11 1998/05/06 03:16:23 curt
1040 // Added an averaged global frame rate counter.
1041 // Added an option to control tile radius.
1043 // Revision 1.10 1998/05/03 00:47:31 curt
1044 // Added an option to enable/disable full-screen mode.
1046 // Revision 1.9 1998/04/30 12:34:17 curt
1047 // Added command line rendering options:
1048 // enable/disable fog/haze
1049 // specify smooth/flat shading
1050 // disable sky blending and just use a solid color
1051 // enable wireframe drawing mode
1053 // Revision 1.8 1998/04/28 01:20:21 curt
1054 // Type-ified fgTIME and fgVIEW.
1055 // Added a command line option to disable textures.
1057 // Revision 1.7 1998/04/26 05:10:02 curt
1058 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
1060 // Revision 1.6 1998/04/25 22:06:30 curt
1061 // Edited cvs log messages in source files ... bad bad bad!
1063 // Revision 1.5 1998/04/25 20:24:01 curt
1064 // Cleaned up initialization sequence to eliminate interdependencies
1065 // between sun position, lighting, and view position. This creates a
1066 // valid single pass initialization path.
1068 // Revision 1.4 1998/04/24 14:19:30 curt
1071 // Revision 1.3 1998/04/24 00:49:18 curt
1072 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
1073 // Trying out some different option parsing code.
1074 // Some code reorganization.
1076 // Revision 1.2 1998/04/22 13:25:41 curt
1077 // C++ - ifing the code.
1078 // Starting a bit of reorganization of lighting code.
1080 // Revision 1.1 1998/04/21 17:02:39 curt
1081 // Prepairing for C++ integration.
1083 // Revision 1.71 1998/04/18 04:11:26 curt
1084 // Moved fg_debug to it's own library, added zlib support.
1086 // Revision 1.70 1998/04/14 02:21:02 curt
1087 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
1088 // <jgoeke@voyager.net>
1090 // Revision 1.69 1998/04/08 23:35:34 curt
1091 // Tweaks to Gnu automake/autoconf system.
1093 // Revision 1.68 1998/04/03 22:09:03 curt
1094 // Converting to Gnu autoconf system.
1096 // Revision 1.67 1998/03/23 21:24:37 curt
1097 // Source code formating tweaks.
1099 // Revision 1.66 1998/03/14 00:31:20 curt
1100 // Beginning initial terrain texturing experiments.
1102 // Revision 1.65 1998/03/09 22:45:57 curt
1103 // Minor tweaks for building on sparc platform.
1105 // Revision 1.64 1998/02/20 00:16:23 curt
1106 // Thursday's tweaks.
1108 // Revision 1.63 1998/02/16 16:17:39 curt
1111 // Revision 1.62 1998/02/16 13:39:42 curt
1112 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
1113 // tiles to occasionally be missing.
1115 // Revision 1.61 1998/02/12 21:59:46 curt
1116 // Incorporated code changes contributed by Charlie Hotchkiss
1117 // <chotchkiss@namg.us.anritsu.com>
1119 // Revision 1.60 1998/02/11 02:50:40 curt
1122 // Revision 1.59 1998/02/09 22:56:54 curt
1123 // Removed "depend" files from cvs control. Other minor make tweaks.
1125 // Revision 1.58 1998/02/09 15:07:49 curt
1128 // Revision 1.57 1998/02/07 15:29:40 curt
1129 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
1130 // <chotchkiss@namg.us.anritsu.com>
1132 // Revision 1.56 1998/02/03 23:20:23 curt
1133 // Lots of little tweaks to fix various consistency problems discovered by
1134 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
1135 // passed arguments along to the real printf(). Also incorporated HUD changes
1136 // by Michele America.
1138 // Revision 1.55 1998/02/02 20:53:58 curt
1139 // Incorporated Durk's changes.
1141 // Revision 1.54 1998/01/31 00:43:10 curt
1142 // Added MetroWorks patches from Carmen Volpe.
1144 // Revision 1.53 1998/01/27 18:35:54 curt
1147 // Revision 1.52 1998/01/27 00:47:56 curt
1148 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
1149 // system and commandline/config file processing code.
1151 // Revision 1.51 1998/01/26 15:57:05 curt
1152 // Tweaks for dynamic scenery development.
1154 // Revision 1.50 1998/01/19 19:27:07 curt
1155 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
1156 // This should simplify things tremendously.
1158 // Revision 1.49 1998/01/19 18:40:31 curt
1159 // Tons of little changes to clean up the code and to remove fatal errors
1160 // when building with the c++ compiler.
1162 // Revision 1.48 1998/01/19 18:35:46 curt
1163 // Minor tweaks and fixes for cygwin32.
1165 // Revision 1.47 1998/01/13 00:23:08 curt
1166 // Initial changes to support loading and management of scenery tiles. Note,
1167 // there's still a fair amount of work left to be done.
1169 // Revision 1.46 1998/01/08 02:22:06 curt
1170 // Beginning to integrate Tile management subsystem.
1172 // Revision 1.45 1998/01/07 03:18:55 curt
1173 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
1175 // Revision 1.44 1997/12/30 22:22:31 curt
1176 // Further integration of event manager.
1178 // Revision 1.43 1997/12/30 20:47:43 curt
1179 // Integrated new event manager with subsystem initializations.
1181 // Revision 1.42 1997/12/30 16:36:47 curt
1182 // Merged in Durk's changes ...
1184 // Revision 1.41 1997/12/30 13:06:56 curt
1185 // A couple lighting tweaks ...
1187 // Revision 1.40 1997/12/30 01:38:37 curt
1188 // Switched back to per vertex normals and smooth shading for terrain.
1190 // Revision 1.39 1997/12/22 23:45:45 curt
1191 // First stab at sunset/sunrise sky glow effects.
1193 // Revision 1.38 1997/12/22 04:14:28 curt
1194 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
1196 // Revision 1.37 1997/12/19 23:34:03 curt
1197 // Lot's of tweaking with sky rendering and lighting.
1199 // Revision 1.36 1997/12/19 16:44:57 curt
1200 // Working on scene rendering order and options.
1202 // Revision 1.35 1997/12/18 23:32:32 curt
1203 // First stab at sky dome actually starting to look reasonable. :-)
1205 // Revision 1.34 1997/12/17 23:13:34 curt
1206 // Began working on rendering a sky.
1208 // Revision 1.33 1997/12/15 23:54:45 curt
1209 // Add xgl wrappers for debugging.
1210 // Generate terrain normals on the fly.
1212 // Revision 1.32 1997/12/15 20:59:08 curt
1215 // Revision 1.31 1997/12/12 21:41:25 curt
1216 // More light/material property tweaking ... still a ways off.
1218 // Revision 1.30 1997/12/12 19:52:47 curt
1219 // Working on lightling and material properties.
1221 // Revision 1.29 1997/12/11 04:43:54 curt
1222 // Fixed sun vector and lighting problems. I thing the moon is now lit
1225 // Revision 1.28 1997/12/10 22:37:45 curt
1226 // Prepended "fg" on the name of all global structures that didn't have it yet.
1227 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
1229 // Revision 1.27 1997/12/09 05:11:54 curt
1230 // Working on tweaking lighting.
1232 // Revision 1.26 1997/12/09 04:25:29 curt
1233 // Working on adding a global lighting params structure.
1235 // Revision 1.25 1997/12/08 22:54:09 curt
1236 // Enabled GL_CULL_FACE.
1238 // Revision 1.24 1997/11/25 19:25:32 curt
1239 // Changes to integrate Durk's moon/sun code updates + clean up.
1241 // Revision 1.23 1997/11/15 18:16:34 curt
1244 // Revision 1.22 1997/10/30 12:38:41 curt
1245 // Working on new scenery subsystem.
1247 // Revision 1.21 1997/09/23 00:29:38 curt
1248 // Tweaks to get things to compile with gcc-win32.
1250 // Revision 1.20 1997/09/22 14:44:19 curt
1251 // Continuing to try to align stars correctly.
1253 // Revision 1.19 1997/09/18 16:20:08 curt
1254 // At dusk/dawn add/remove stars in stages.
1256 // Revision 1.18 1997/09/16 22:14:51 curt
1257 // Tweaked time of day lighting equations. Don't draw stars during the day.
1259 // Revision 1.17 1997/09/16 15:50:29 curt
1260 // Working on star alignment and time issues.
1262 // Revision 1.16 1997/09/13 02:00:06 curt
1263 // Mostly working on stars and generating sidereal time for accurate star
1266 // Revision 1.15 1997/09/05 14:17:27 curt
1267 // More tweaking with stars.
1269 // Revision 1.14 1997/09/05 01:35:53 curt
1270 // Working on getting stars right.
1272 // Revision 1.13 1997/09/04 02:17:34 curt
1275 // Revision 1.12 1997/08/27 21:32:24 curt
1276 // Restructured view calculation code. Added stars.
1278 // Revision 1.11 1997/08/27 03:30:16 curt
1279 // Changed naming scheme of basic shared structures.
1281 // Revision 1.10 1997/08/25 20:27:22 curt
1282 // Merged in initial HUD and Joystick code.
1284 // Revision 1.9 1997/08/22 21:34:39 curt
1285 // Doing a bit of reorganizing and house cleaning.
1287 // Revision 1.8 1997/08/19 23:55:03 curt
1288 // Worked on better simulating real lighting.
1290 // Revision 1.7 1997/08/16 12:22:38 curt
1291 // Working on improving the lighting/shading.
1293 // Revision 1.6 1997/08/13 20:24:56 curt
1294 // Changes due to changing sunpos interface.
1296 // Revision 1.5 1997/08/06 21:08:32 curt
1297 // Sun position now really* works (I think) ... I still have sun time warping
1298 // code in place, probably should remove it soon.
1300 // Revision 1.4 1997/08/06 15:41:26 curt
1301 // Working on correct sun position.
1303 // Revision 1.3 1997/08/06 00:24:22 curt
1304 // Working on correct real time sun lighting.
1306 // Revision 1.2 1997/08/04 20:25:15 curt
1307 // Organizational tweaking.
1309 // Revision 1.1 1997/08/02 18:45:00 curt
1310 // Renamed GLmain.c GLUTmain.c
1312 // Revision 1.43 1997/08/02 16:23:47 curt
1315 // Revision 1.42 1997/08/01 19:43:33 curt
1316 // Making progress with coordinate system overhaul.
1318 // Revision 1.41 1997/07/31 22:52:37 curt
1319 // Working on redoing internal coordinate systems & scenery transformations.
1321 // Revision 1.40 1997/07/30 16:12:42 curt
1322 // Moved fg_random routines from Util/ to Math/
1324 // Revision 1.39 1997/07/21 14:45:01 curt
1327 // Revision 1.38 1997/07/19 23:04:47 curt
1328 // Added an initial weather section.
1330 // Revision 1.37 1997/07/19 22:34:02 curt
1331 // Moved PI definitions to ../constants.h
1332 // Moved random() stuff to ../Utils/ and renamed fg_random()
1334 // Revision 1.36 1997/07/18 23:41:25 curt
1335 // Tweaks for building with Cygnus Win32 compiler.
1337 // Revision 1.35 1997/07/18 14:28:34 curt
1338 // Hacked in some support for wind/turbulence.
1340 // Revision 1.34 1997/07/16 20:04:48 curt
1341 // Minor tweaks to aid Win32 port.
1343 // Revision 1.33 1997/07/12 03:50:20 curt
1344 // Added an #include <Windows32/Base.h> to help compiling for Win32
1346 // Revision 1.32 1997/07/11 03:23:18 curt
1347 // Solved some scenery display/orientation problems. Still have a positioning
1348 // (or transformation?) problem.
1350 // Revision 1.31 1997/07/11 01:29:58 curt
1351 // More tweaking of terrian floor.
1353 // Revision 1.30 1997/07/10 04:26:37 curt
1354 // We now can interpolated ground elevation for any position in the grid. We
1355 // can use this to enforce a "hard" ground. We still need to enforce some
1356 // bounds checking so that we don't try to lookup data points outside the
1359 // Revision 1.29 1997/07/09 21:31:12 curt
1360 // Working on making the ground "hard."
1362 // Revision 1.28 1997/07/08 18:20:12 curt
1363 // Working on establishing a hard ground.
1365 // Revision 1.27 1997/07/07 20:59:49 curt
1366 // Working on scenery transformations to enable us to fly fluidly over the
1367 // poles with no discontinuity/distortion in scenery.
1369 // Revision 1.26 1997/07/05 20:43:34 curt
1370 // renamed mat3 directory to Math so we could add other math related routines.
1372 // Revision 1.25 1997/06/29 21:19:17 curt
1373 // Working on scenery management system.
1375 // Revision 1.24 1997/06/26 22:14:53 curt
1376 // Beginning work on a scenery management system.
1378 // Revision 1.23 1997/06/26 19:08:33 curt
1379 // Restructuring make, adding automatic "make dep" support.
1381 // Revision 1.22 1997/06/25 15:39:47 curt
1382 // Minor changes to compile with rsxnt/win32.
1384 // Revision 1.21 1997/06/22 21:44:41 curt
1385 // Working on intergrating the VRML (subset) parser.
1387 // Revision 1.20 1997/06/21 17:12:53 curt
1388 // Capitalized subdirectory names.
1390 // Revision 1.19 1997/06/18 04:10:31 curt
1391 // A couple more runway tweaks ...
1393 // Revision 1.18 1997/06/18 02:21:24 curt
1394 // Hacked in a runway
1396 // Revision 1.17 1997/06/17 16:51:58 curt
1397 // Timer interval stuff now uses gettimeofday() instead of ftime()
1399 // Revision 1.16 1997/06/17 04:19:16 curt
1400 // More timer related tweaks with respect to view direction changes.
1402 // Revision 1.15 1997/06/17 03:41:10 curt
1403 // Nonsignal based interval timing is now working.
1404 // This would be a good time to look at cleaning up the code structure a bit.
1406 // Revision 1.14 1997/06/16 19:32:51 curt
1407 // Starting to add general timer support.
1409 // Revision 1.13 1997/06/02 03:40:06 curt
1410 // A tiny bit more view tweaking.
1412 // Revision 1.12 1997/06/02 03:01:38 curt
1413 // Working on views (side, front, back, transitions, etc.)
1415 // Revision 1.11 1997/05/31 19:16:25 curt
1416 // Elevator trim added.
1418 // Revision 1.10 1997/05/31 04:13:52 curt
1419 // WE CAN NOW FLY!!!
1421 // Continuing work on the LaRCsim flight model integration.
1422 // Added some MSFS-like keyboard input handling.
1424 // Revision 1.9 1997/05/30 19:27:01 curt
1425 // The LaRCsim flight model is starting to look like it is working.
1427 // Revision 1.8 1997/05/30 03:54:10 curt
1428 // Made a bit more progress towards integrating the LaRCsim flight model.
1430 // Revision 1.7 1997/05/29 22:39:49 curt
1431 // Working on incorporating the LaRCsim flight model.
1433 // Revision 1.6 1997/05/29 12:31:39 curt
1434 // Minor tweaks, moving towards general flight model integration.
1436 // Revision 1.5 1997/05/29 02:33:23 curt
1437 // Updated to reflect changing interfaces in other "modules."
1439 // Revision 1.4 1997/05/27 17:44:31 curt
1440 // Renamed & rearranged variables and routines. Added some initial simple
1441 // timer/alarm routines so the flight model can be updated on a regular
1444 // Revision 1.3 1997/05/23 15:40:25 curt
1445 // Added GNU copyright headers.
1448 // Revision 1.2 1997/05/23 00:35:12 curt
1449 // Trying to get fog to work ...
1451 // Revision 1.1 1997/05/21 15:57:51 curt
1452 // Renamed due to added GLUT support.
1454 // Revision 1.3 1997/05/19 18:22:42 curt
1455 // Parameter tweaking ... starting to stub in fog support.
1457 // Revision 1.2 1997/05/17 00:17:34 curt
1458 // Trying to stub in support for standard OpenGL.
1460 // Revision 1.1 1997/05/16 16:05:52 curt
1461 // Initial revision.